KYN28A-12 Metal clab Switchgear with drawable Type VCB 1. The choice of ABB produced or made VS1 Vacuum Circuit Breaker VD4 vacuum circuit breaker. 2. Use of imported high-quality aluminum zinc steel sheet or galvanized sheet assembly of high-precision enclosure, without painting and never rust. 3. Full metal armor, the functional units completely separate. 4. Precision screw drive out of the home-style units, even if the doors have closed and operational mobility. 5. Simple and effective "anti-5" latch to prevent misuse. 6. Stricter protective measures to prevent foreign matter and pest invasion, to ensure safe operation. 7. Space for plenty of cable termination room, can be accessed by multiple cables. 8. Easy to operate and easy to monitor enclosure design. 9. Small size and can be installed on the wall, switchgear, power distribution between the area of savings. 10. High speed grounding switch for grounding and circuit shorted.